However, the Doctor and Amy recognise it as a modern-day aircraft carrier. The Doctor abandons Amy while he nips off in the TARDIS to the flight deck of the aircraft carrier. A quick examination of the controls reveals an infestation of Time Roaches — creatures that, attracted by radiation leaks into the Space-Time continuum, have got into the engines and caused trouble by dropping the carrier two hundred years back in the past.

Tracking the infestation to the engine room, the Doctor reverses the neutron flow and the Time Roaches are sent back into the Vortex. The Doctor leaves the carrier with little time to spare before it goes back to its own time. He returns to collect Amy, who has made friends with some of the sailors aboard the ship.